https://bugs.documentfoundation.org/show_bug.cgi?id=113141
--- Comment #7 from Maxim Monastirsky <momonas...@gmail.com> ---
(In reply to Yousuf Philips (jay) from comment #6)
> Not there in Gnome's character map (attachment 136982 [details]),
> KCharSelect or character map sections of font management apps i've seen on
> Mac, so guess it isnt a standard.
Dotted circle is not only used for diacritics in the official Unicode charts,
but also suggested as an implementation in the Unicode standard. See chapter 5,
section 5.13 Rendering Nonspacing Marks, under "Fallback Rendering". See also
Microsoft's notes at [1] (under "Handling Invalid Combining Marks"). So it's
clearly supposed to be shown in the text (but not necessarily have to be shown
in a charmap app).
(In reply to Khaled Hosny from comment #5)
> That is by design. If a combining mark is at the start of the text, it is
> displayed over a dotted circle since a combining mark needs something to
> combine with. You can put a space or no breaking space before the mark if
> the dotted circle is undesired.
Isn't it against the referenced Unicode standard, as it says that if a
nonspacing mark occurs as the first character in the text, it should be handled
as if it had a no-break space before it?
[1] https://www.microsoft.com/typography/OpenTypeDev/arabic/intro.htm#shape
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